Research
International Daffodil Register and Classified List (1998)
DIVISION 11 - SPLIT-CORONA DAFFODIL CULTIVARS
Corona split - usually for more than half its length
 |
a) Collar Daffodils
Split-corona daffodils with the corona segments opposite the perianth segments; the corona segments usually in two whorls of three |
 |
b) Papillon Daffodils
Split-corona daffodils with the corona segments alternate to the perianth segments; the corona segments usually in a single whorl of six |
DIVISION 12 - OTHER DAFFODIL CULTIVARS
Daffodil cultivars which do not fit the definition of any other division
DIVISION 13 - DAFFODILS DISTINGUISHED SOLELY BY BOTANICAL NAME
SECTION TAPEINANTHUS
Autumn flowering; one to four flowers to a rounded stem; leaves very narrow, glaucous, not always present on flowering bulbs; flower ascending, yellow; corona absent or rudimentary; anthers widely exserted from the tube, much shorter than the filaments, dorsifixed
SECTION SEROTINI
Autumn flowering; usually one to two flowers to a rounded stem; leaves very narrow, glaucous, not always present on flowering bulbs; perianth segments pure white, usually twisted; corona very short, yellow, orange or green; anthers included in or slightly exserted from the tube, longer than the filaments, dorsifixed; flowers fragrant
SECTION AURELIA
Autumn flowering; three to twelve flowers to a compressed stem; leaves flat not channelled, glaucous; flowers white; corona rudimentary or absent; filaments unequal in length; anthers exserted from the tube, dorsifixed; flowers fragrant
SECTION TAZETTAE
Autumn to Spring flowering; three (rarely two) to twenty flowers to a usually compressed stem; leaves flat or channelled, usually glaucous; flowers white, yellow or bicoloured; anthers included in or slightly exserted from the tube, much longer than the filaments, dorsifixed; flowers fragrant. The rounded stem and green leaves of N. aureus atypical, also the orange corona of N. elegans
SECTION NARCISSUS
Spring flowering; usually one flower (exceptionally two to four) to a compressed stem; leaves flat not channelled, glaucous; perianth segments pure white; corona disc-shaped or very shallow, sometimes of a single colour, but usually with base green, mid-zone yellow and rim red or orange and often scarious; anthers partly exserted from the tube, much longer than the filaments, dorsifixed; flowers fragrant. Section covers N. poeticus